This error can be due to not passing in the SOAP Action, or could be due to incorrect ValidConsmName/ValidConsmProd/InstRtId/InstEnv grouping. Please make sure you are following the values provided by Jack Henry and that you are following the guidance found here https://jackhenry.dev/open-enterprise-api-docs/enterprise-soap-api/getting-started/development/development-using-soap/#jxchange-header.